I am trying to edit a scanned in PDF in which i highlight the necessary details as i put them into an autocad drawing. Every time i need to move around the page it is choppy, and every time i want to highlight one detail, the software stops and has to load (sometimes saying 'Not Responding') and takes anywhere from 5 to almost 30 seconds to recognize the command i want, and execute it, every. single. time. This is ridiculous, and wastes useful time in completing my work.